Fire-alarm.



C. I. CID.

FIRE ALARM.

APPLICA'I'ION FILED JULY 27. 19 15.

PatentedSept. 26,1916.

2 SHEETSSHEET 1-.

WITNESSES C. J. CID.

FIRE ALARM.

APPLICATION FILED JULY 21. 1915.

Patented Sept. 26, 1916.

' 2 SHEETS-SHEET 2.

' INVENTOR QJCMZ MJ {M /52 CESAR JOSEPH CID, CF QUEBEC, QUEBEC, CANADA.

FIRE-ALARM.

Specification of Letters Patent. Patented Sept. 26, 1916.

Application filed July 27, 1915. Serial N 0. 42,222.

T all whom it may concern:

Be it known that I, CESAR JOSEPH CID, a subject of the King of Great Britain, and residing at the city of Quebec, in the Province of Quebec, in the Dominion of Canada, have invented certain new and use- I ful Improvements in Fire-Alarms; and I do hereby declare that the following is a full, clear, and exact description of the. same.

The invention relates to improvements in alarms especially fire alarms and the object is to devise an alarm of a portable nature that can be placed in any desired spot and sound an alarm and turn on an electric lamp at any desired temperature.

The invention comprises a small portable box or casing including an electric bell having one of its poles connected to a dry battery, the other pole connected to the end of a pin or rod which rests'on a disk that eX- pands whenv in contact with the heat, the other pole of the battery being connected to an adjustable screw which is just above the other end of the rod or pin and so arranged that it will come in contact with the said screw and form a circuit when the heat strikes the said expansible disk. By means of a special arrangement with the said disk,

a light may also be turned on if desired,

taking its current from any suitable source. The alarm is so arranged that it can be set to ring the bell or turn on the light at any desired degree oftemperatnre.

One form of the device is shown in the accompanying drawings in which- Figure 1 is a front elevation of the alarm. Fig. 2 is a rear elevation. Fig. 3 is an inside section view from the side of the alarm, Fig. 4 is a section view on lines AB, and Fig. 5 is a diagram of circuit connections.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings, 1 is the casing having the hinged door 2 and 3 is a handle secured on the uppermost part of the casing so that it may be easily handled. A circular graduated plate 4 is secured to one of the sides, preferably the front, on which are written the different degrees of temperature which is indicated by theclock hand 5 secured on the end of the shaft 6. Another graduated plate 7 is arranged above the said plate 4 which is also graduated and has a central longitudinal slot 8 through which passes thescrew 9. Said screw 9 is so arranged that it may be set at any desired degree of temperature by unscrewing it and sliding it up or down as the case may be.

Through the front of the casing is preferably arranged a lamp 1O fitted on socket 11. Of course it may be mentioned that this lamp can be placed in any desired spot, but it is here shown as secured'to the casing so that the said al rm will be portable. An electric bell 12 of any suitable make is secured on the opposite side of the casing, but it could be placed on the face of the casing should it be large enough.

13 and 14 are orifices in the lower side of the casing just below the bell 12, and 15 is a slot in the bottom of the said casing adapt- 'ed to receive a device having the shape of a double disk 16 which will expand as shown on dotted lines in Fig. 4, when heat comes in contact with it. This device is well known and is used extensively in incubators toregulate the heat. The said disk is supported by means of a bracket 17 of a U shape, one endof which is secured to the said disk by means of a screw 18, the other end of said bracket having a slot 19 adapted to receive the end of the guide 20 and rigidly secured thereto by the screw 21. The other end of the said guide 20 is secured rigidly to the spider 22 which is rigidly secured to the inner top of the casing.

23 is a plate secured to the top of the casing within the spider 22 in which threads the adjustable thumb screw 24.

25 is a rod loosely sliding with the said guide 20 and having at its lower end an insulating block 26 secured thereto and resting on the said disk 16.

-27 is a rod projecting upwardly from said disk having the outer end 28 flattened and forming a rack.

29 is a bracket projecting outwardly and supporting the end of the inwardly projecting shaft 6 and 30 is a small gear mounted on said shaft engaging the toothed rack 28.

31 is a rod or guide secured at one end to the casing by the bolt 32 and at the other end to the bracket 33 and 34 is a downwardly projecting plate just above the rack 28 in alinement therewith sliding on said guide 31 and on which threads the end of screw 9.

35 is a dry battery suitably disposed in one corner of the casing, said battery having the usual poles 36 and 37. The pole 37 of the said battery nected to the plate 23 at 38 by means of the wire 39. The pole 36 is electrically connected to one of the poles on the bell by means of a wire 40 which passes through the orifice 13 in the casing. Theother pole of the electric bell 12 is electrically connected to the lower end of the rod 25 by means of the wire 41.

It will easily be understood that as the temperature increases, the disk ldexpands gradually and when a certain temperature is reached, which is regulated by means of the screw 24, by screwing it in or unscrew ing it, thereby increasing or lessening the distance between the end of the rod 25 and the end of the said screw 24, a contact will.

occur between the said screw 24 which is in contact with the plate 23 and the end of the said rod 25, thereby forming a circuit with the bell and battery, and ringing the said bell 12.

In the operation of the electric lamp, one

pole on the socket 11 is connected to any suitable outside source of electric current by means of the wire 42 which passes through the orifice 14 in the casing 1 and the other pole is electrically connected to the bracket 33 by means of the wire 43. The bracket 17 is electrically connected to any suitable source of current by means of a wire 44 which passes through the orifice 14 with the wire 42. The bracket 17 being of a conductive material, will transmit current to the disk 16, the said disk 16 transmitting the current to the rack 28. The plate 34 is adjusted to the desired height by means of the screw 9, and when the expansion of the disk happens, the rack 28 engages the gear 30 and slowly moves upwardly. At the same time it turns the shaft 6 and the hand 5 thereby indicating the degree of temperature. When the rack 28 has reached the plate 34, it creeps on the said plate. As soon as the said rack comes in contact with the plate 34 a circuit is formed, the lamp 35 is electrically coning, electrically connected to one of the poles of a battery, a rod suitably mounted in a guide, said guide being supported by a caterpillar bracket secured to the inner upper side of the casing, an adjustable screw above said rod, electrically connected to said battery, a disk shaped capsule suitably supported by a bracket secured to said guide, said capsule supporting'said rod,ian

insulator between said rod and capsule, a

bracket supporting a shaft at one end, the other end of said shaft being suitably supported by a bearing in the casing and projecting outside of said casing, a hand mounted on said outwardly projecting end, a graduated plateon the surface of the casing, a gear mounted on said shaft engaging a rack, mounted onsaid capsule, a shaft secured at one end to thecasing and at the other end to a bracket, another graduated plate mounted on the outside of the casing above the above mentioned graduated plate and having a longitudinal slot, an adjustable screw over said graduated plate, the shank passing through the said longitudinal slot and engaging a thread in an adjustable.

plate sliding on said above mentioned shaft, said plate having a flange downwardly extending above the said rack, a socket secured to said casing, a lamp in said socket projecting outwardly from said casing, one pole of said socket being electrically connected to said bracket thereby. electrifying the downwardly projecting flange of said adjustable plate, the other pole of said socket being electrically connected to any suitable outside current source, said bracket supporting the disk shaped capsule being electrically connected with suitable outside current substantially as set forth and described Signed at the city of Quebec, Quebec, Canada, this twenty-third day of June, 1915.

CESAR JOSEPH CID.

Witnesses HENRI PELLETIER, PAT. AUGER. 

